Commits on May 3, 2023

1. gcs: Add SCSIDevice type with remove operation …

   SCSI devices must be unplugged by the guest before removal on the host
   side, to ensure smooth operation. Previously a SCSI device was unplugged
   when a LCOWMappedVirtualDisk entry was removed. However, we want to
   support multiple mounts per disk, which means we need to decouple unplug
   from unmount.
   
   This change introduces a new SCSIDevice resource type that has a remove
   operation that can be used by the host to trigger an explicit unplug via
   SCSI.
   
   This is a breaking change to the bridge protocol:
   - With new host/old guest, the host will attempt a SCSIDevice remove
     which will fail due to being unsupported by the guest.
   - With old host/new guest, the host will expect the device to be
     unplugged when the disk is removed, which will no longer occur.
   
   Signed-off-by: Kevin Parsons <kevpar@microsoft.com>

   

   kevpar committed May 3, 2023
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